Lambert Hillyer
Director
John Colton
Screenplay
Howard Higgin
Original Story
George Robinson
Director of Photography
Charles Carroll
Sound Recordist
Camille Collins
Production Secretary
Franz Waxman
Original Music Composer
Douglas Hodges
Story
Edmund Grainger
Producer
Fred S. Meyer
Executive Producer
Bernard W. Burton
Editor
Jack Pierce
Makeup Artist
Otto Lederer
Makeup Artist
Albert S. D'Agostino
Art Direction
Raymond Lindsay
Special Effects
John P. Fulton
Visual Effects
Gilbert Kurland
Sound Supervisor
Boris Karloff
Dr. Janos Rukh
Bela Lugosi
Dr. Felix Benet
Frank Lawton
Ronald Drake
Frances Drake
Diana Rukh
Violet Kemble Cooper
Mother Rukh
Beulah Bondi
Lady Arabella Stevens
Walter Kingsford
Sir Francis Stevens
Paul Weigel
Monsieur Noyer
Frank Reicher
Professor Meiklejohn
Georges Renavent
Chief of the Surete
May Beatty
Mme. LeGrand (uncredited)
Paul McAllister
Papa LaCosta (uncredited)
Nydia Westman
Briggs (uncredited)
Ynez Seabury
Celeste (uncredited)
Robert Graves
Gendarme (uncredited)
